how can I add description top and bottom in wordpress category page

https://www.wpbeginner.com/wp-tutorials/how-to-display-category-descriptions-in-wordpress/

no I want second description at the bottom of the category page

Yes, it shows how to add that description anywhere on your archive template. Did you read that part towards the bottom?

Copy and paste this code where you would like the category description to be displayed.

<?php
the_archive_description( ‘<div class=”taxonomy-description”>’, ‘</div>’ );
?>

You could also use a plugin so you can insert the category using shortcode on a page and customize whatever else you want to appear above and below.
https://www.wpbeginner.com/plugins/how-to-list-category-posts-in-a-wordpress-post-or-page-with-shortcode/

this code is not working

you’ll have to research that you used the correct template file. archive.php or category.php maybe? Follow the instructions on the link I gave you.

yess yes im using archive.php